Machine



A. A. CLARKE.

SURFACE TREATING MACHINE.

APPLICATION FILED MAR.26,198. RENEWED FEB. 6. 1920.

1,352,583. PatentedSept. 14,1920.

Z if.2. I 1 .3.

WITNESSES: INVEJV TOR.

ALEX CLARKE ATTORNEY.

- o control-of. the operator.

UNITED -CE- ALEX CLABKEIYQF A A YTEXAsJ SURFACE-TREATING?-MVACHINEQspecificationgo'f e ar fjratented sept."14, 1920.

Application filed March 26, 11918, Seria1.No..224,748. renewed Februaryegf-iezo. Serial no; 355397;

To all/whom itma z) concern: I Be it known that I, ALEX A. CLARKE, a

citizen of the United States, residing at -Dal-- las, in the county; ofDallas and State of Texas, have invented certain new and usefulImprovements Surface-Treating Ma-. chines, of which the following is aspecifica tion. 7 w

This invention relates to surface-treating machines. o The idea involvedinthisinvention .is to provide a surface-treating member in an annularform andto dispose within the samea I complete driv ng and operatingunit, where- I by the memberiis revolvedg andtsto associate with saidmember and unit a supportwhereby the surface-treating member, isycarriedand may be appliedtothe workxunder full In carrying out the invention anannular surface-treating or. abradingqmember s mounted onaMself-contained motor/unit which in turn is mounted in a supportingframe. The motor unit is electrically driven and" this obviates gearsand othenpower transmitting ,devices and provides; for 4 simplicity, aswell as adirect,applicationiofthe power tov the abrading member. The.motor unit is journaled -in'thesupportingirame, 30

and the, said framehasoneach side oifthe abrading :membera pair of-legsor stands ards, .one of which is adjustable,j:whereby the support may beadjustedtoward and from the workand thefdepth of the-cut ,or

pressure of the surface-treating member controlled at; will. 1 E

In a a more p c c embodiment. o t e invention avrectangular ;support1ng;frame 18 o provided and carries at each corner a leg,

the leg a one e d being a ju t leelectric motor is mounted in the frame"and is of that type 7 in which i the, :fields revolve and are carried ina cylindrical housing.

On; the periphery ofthis housing an annullar surface-treating member isconfined; The feet'orouter extremit esof the support-:

ing legs are brought into contact with the surface to be treated andbythe adjustment r A provided the projection of the surface-treatingmember beyond the plane of the extremities o'lsaidlegs is controlled,and said-surface-treating member may be adjusted to the work to a minutedegree v invention is illustrated, and wherein -v I suitablehandlesbyworkman may holdand control themachineQ: I

1 a The invention will-be more readily under stood from a reading of thefollowings'peciticatlon and byreference to the accompanyngdrawing'; inwhich anexample of the F gure 1 is ,ajsid'e elevation of amachineconstructed in accordancewith' this invention, a portion; beingillustrated in section,

Fig 2 is an end elevation of the same," and @F1gt3 1s a plan view.;' 7

asimilar pairotstandards3 are provided at theoppositeendof said plate.Oneach side the standard 2; is; connected with the standard?) byasidebar. isubstalitially par allel thefplate The standards Sare me t bym sba 5: 1 =.the's.a Plane with the bars ft. The parts l to-5 inclusiveiornia supporting 'orgcarrying frame-the particular vtormation of whichmaybe va r1ed.'. A stat onary armaturefi has-vits ends fastened in thesidebars :andextends-bee V.

tween. same centrally of the frame; ,-A motor housing 7 surrounds the jarmature and carriesfltlie iusual I fields (not shown), whereby itisrevol-ved. v r commutator ';8;', is carried by the hous ng andbrush-terminals 9 mounted Oilihfl pl ted have engagement with said it oator. The motor unit is not illustrated indetail as it is of a typefohowin commen use and vwell known in the art of elec tricity, Wires -10 leadfrom the terminals 9 to I a switch socket 11, adapted to receive anattachment plug 12 wherebyelectric current may bee supplied to the motorand controlled as; desired; I

' I f housing? ery, andrcarriesj an vannular} abradingmember 1'3 fittingsnugly thereon and-formed of suit 5- able; material as sand :paper,emery cloth or the like, It willlbe-seen that the surfacetreatmg memberis Icarried by a revolving motor un t and gears and, similar drivingelements; are eliminatedg Thi provides ;a,

very lsinple construction and affords not only a d rect application.ofithepower to the surface-treating memberbut a high speed of reyoution which is 1 quite desirable e in I this a io rm hmesworked on, themember 13 will engage said surface as indicated in Figs. 1 and 2. Legs16 are threaded through the standards 3 and carry feet 17 on their outerextremities. It will bereadily seen that by adjusting the legs 16 therelation between the member 13 and the surface to be worked iscontrolled. Said legs 16 maybe projected to the point where the saidmember 13 just engages the working surface, orthey may be retracted sothat the member 13 will bury itself and cut deeply into thesurface beingtreated. It

' Y evenly.

is obvious that the legs 16 should be adjusted in unison and should havetheir feet 17 in registration sothatthemember 13' will at tack theworking surface uniformly and It is apparent that various means foradjusting the legs 16 might be provided. In the drawings I have shown ahandle member comprisinga tubular hand-grip 18 extending transversely ofthe plate on the opposite end fromthe standards 3 and rotatably confinedin'brac-kets 19. The grip 18 has portions projecting beyond the bracketsand carrying beveled gears 20 which mesh with'beveled pinions21'rotatably confined in bearing boxes 22 secured to the brackets 19.The legs 16 project-up through the pinion's and are threaded therein sothat when said pinions are" revolved said legs are moved longitudinally.The legs 16 are suitably held against rotation. 'At' the opposite end ofthe plate a handle member 23, having a transverse hand-grip 24 ismounted.

. In using'the machine the operator grasps the hand-grips 18. and 24:,and after having manipulated the switch 11 to'start the motor, heplacesthe feet 15 and 17 against the surface to be treated and'by turning thegrip 18 the'legs 16 are projected or retracted from the frame throughthe instrumentality of the beveled gears; thusathe abrading action ofthe member'13 on the surface may be regulated to a'nic'ety. If theabrading member'13 is not cutting deep enough or exerting sufficientpressure on the work the workman has only to rotate the part 18-towithdraw the legs 16, whereby the member '13 islet into the surface, butif'themember 13 is cutting too deep or acting'too severely on thesurface thepart'18 is revolved in the opposite direction wherebytheilegs 16 are projected'and the member 13 withdrawn. The pitch of thethreads on the legs 16 and the ratio of the gears and pinions are suchthat only a slight rotation of the part 18 is necessary to obtain anadjustment of the abrading member 13, but not so rapid as to prevent avery' minute adjustment. The operator moves the machine over the surfacebeing treated and the abrading member 13 removes the material from thesurface or of the surface according to its adjust- 'ment. It is obviousthat the member 13 might be a grinding member or a polishing member,butin the latter case considerable skill would be necessary on the-partof the workman in passing the machine over the surface in order 'to getasmooth and even job,therefore the machine is more particularly designedfor abrading and grinding rather than polishing." V 7 It will be seenthat the machine may be used to work on surfaces in all positions towhich access may be had. In treating the surfaces of a body the top,sides, ends and bottom, both inside and outside, may be eflicientlyworked on, provided there is room for the machine. The machine is at alltimes under the direct control of the workman and owingto thev highspeed. of revolution of the abrading member the workmay be expeditiouslyperformed.

The foregoing description andillustration clearly express the invention,but it is to be understood that said illustration is merely an'exemplification and the invention may be the frame on each side of thehousing for positioning the surface treating member with relation to thesurface of the work,

saidelements being constructed to effect an advancement or retraction ofthe surface treating member with relation to the surface of the work.

2. In a surface-treating machine, the combination of a supporting frame,of an electric motor mounted in the frame and including a revolvinghousing, an annular surface-treating member mounted on the housing ofthe motor, handles on the frame for holding the same, a pair of fixedlegs at one end of the frame, a pair of adjustable legs at the other endof the frame, said surface-treating member being disposed intermediatethe ends of the frame and between the legs thereat. T

' 3. In a surface-treating machine, a supporting frame, an electricmotor mounted the surface-treating machine, a pair of adjustable legsprojecting from the frame on L the opposite side of the surface-treatingmember, a handle fixed atone end of the frame, and a combined handle andadjusting device mounted at the other end of the frame and havingconnections for advancing or retracting the said ad'ustable legs.

In testimonyywhereof 'I a x my signature.

I ALEX A. CLARKE.

